Xia, D, Li, H, Mannering, J et al. (6 more authors) (2020) Electrically Heatable Graphene Aerogels as Nanoparticle Supports in Adsorptive Desulfurization and High‐Pressure CO2 Capture. Advanced Functional Materials, 30 (40). 2002788. ISSN 1616-301X
Abstract
Reduced‐graphene‐oxide (rGO) aerogels provide highly stabilising, multifunctional, porous supports for hydrotalcite‐derived nanoparticles, such as MgAl‐mixed‐metal‐oxides (MgAl‐MMO), in two commercially important sorption applications. Aerogel‐supported MgAl‐MMO nanoparticles show remarkable enhancements in adsorptive desulfurization performance compared to unsupported nanoparticle powders, including substantial increases in organosulfur uptake capacity (>100% increase), sorption kinetics (>30‐fold), and nanoparticle regeneration stability (>3 times). Enhancements in organosulfur capacity are also observed for aerogel‐supported NiAl‐ and CuAl‐metal‐nanoparticles. Importantly, the electrical conductivity of the rGO aerogel network adds completely new functionality by enabling accurate and stable nanoparticle temperature control via direct electrical heating of the graphitic support. Support‐mediated resistive heating allows for thermal nanoparticle recycling at much faster heating rates (>700 °C∙min−1) and substantially reduced energy consumption, compared to conventional, external heating. For the first time, the CO2 adsorption performance of MgAl‐MMO/rGO hybrid aerogels is assessed under elevated‐temperature and high‐CO2‐pressure conditions relevant for pre‐combustion carbon capture and hydrogen generation technologies. The total CO2 capacity of the aerogel‐supported MgAl‐MMO nanoparticles is more than double that of the unsupported nanoparticles and reaches 2.36 mmol·CO2 g−1 ads (at p CO2 = 8 bar, T = 300 °C), outperforming other high‐pressure CO2 adsorbents.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2020 Wiley‐VCH GmbH. This is the peer reviewed version of the following article: Xia, D., Li, H., Mannering, J., Huang, P., Zheng, X., Kulak, A., Baker, D., Iruretagoyena, D., Menzel, R., Electrically Heatable Graphene Aerogels as Nanoparticle Supports in Adsorptive Desulfurization and High‐Pressure CO2 Capture. Adv. Funct. Mater. 2020, 2002788., which has been published in final form at https://doi.org/10.1002/adfm.202002788. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions. |
Keywords: | desulfurization; graphene aerogels; Joule heating; mixed metal oxides; pre‐combustion CO 2 capture |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Chemistry (Leeds) > Inorganic Chemistry (Leeds) The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Physics and Astronomy (Leeds) > Soft Matter Physics (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 13 Aug 2020 11:41 |
Last Modified: | 08 Jun 2022 10:11 |
Status: | Published |
Publisher: | Wiley |
Identification Number: | 10.1002/adfm.202002788 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:164356 |